Doors and hatches
Brown Interior Door Old Double
Press & hold Activate to lock it or set a combination. Upgrade & repair with a construction tool using the secondary action.
Harvest drops
Wood× 2
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
Drops when destroyed
Brass× 40
When it collapses
Falling, it leaves 
Wood Debris (Terrain) (75% of the time) where it lands.
Where to find (1 POIs)
Scarecrow Fields (tier 3).
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.